thats why its a shitty design
autocanons are all about rate of fire. Since modern ammunition is always penetrating enough and modern fire control systems are accuarte enough he with better rate of fire usually wins out. And the Rarden has such a low rate of fire its being fucked hard if it every comes across a busmaster, Rheimental, whatever the french use, or most dangerously, a 2A72
Its rate of fire is retardidly low